CloudStack HostTags API Missing Auth (4.124.20.3.0, 4.214.22.1.0)
CVE-2026-66721 Published on August 21, 2026
Apache CloudStack: Authorization issue with listHostTags for domain admins
Missing authorization issue for domain admins in CloudStack's host tags listing functionality.
Domain Admins, by default, have permission to call the listHostTags API, but the API returns host tags for every host in the environment without domain scoping. It should instead be restricted to only the hosts dedicated to that admin's domain.
This issue affects Apache CloudStack: from 4.12.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.
Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-66721 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-66721
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Affected Versions
Apache Software Foundation Apache CloudStack:- Version 4.12.0.0, <= 4.20.3.0 is affected.
- Version 4.21.0.0, <= 4.22.1.0 is affected.